/
camel_case_keys.js
54 lines (43 loc) · 1.06 KB
/
camel_case_keys.js
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'use strict';
const camelCase = require('camel-case');
const rPrefixUnderscore = /^(_+)/;
function getter(key) {
return function() {
return this[key];
};
}
function setter(key) {
return function(value) {
this[key] = value;
};
}
function camelCaseKeys(obj) {
if (typeof obj !== 'object') throw new TypeError('obj must be an object!');
const keys = Object.keys(obj);
const result = {};
for (let i = 0, len = keys.length; i < len; i++) {
const key = keys[i];
const value = obj[key];
const match = key.match(rPrefixUnderscore);
let newKey;
if (match) {
const underscore = match[1];
newKey = underscore + camelCase(key.substring(underscore.length));
} else {
newKey = camelCase(key);
}
if (newKey === key) {
result[key] = value;
} else {
result[newKey] = value;
Object.defineProperty(result, key, {
get: getter(newKey),
set: setter(newKey),
configurable: true,
enumerable: true
});
}
}
return result;
}
module.exports = camelCaseKeys;